This combo from images provided by the FBI shows surveillance footage at the home of Nancy Guthrie the night she went missing in Tucson, Ariz. (FBI via AP)

TUCSON, Ariz. — Investigators in Arizona want residents near Nancy Guthrie ‘s home to share surveillance camera footage of suspicious cars or people they may have noticed in the month before she disappeared.

The alert went across a 2-mile radius in neighborhoods close to where the mother of “Today” show host Savannah Guthrie went missing 12 days ago, the Pima County Sheriff’s Department said Thursday.

It asked for video of “anything neighbors deem out of the ordinary or important to our investigation” since the beginning of January.

Federal and local officers have been going door-to-door in Tucson neighborhoods around 84-year-old Nancy Guthrie’s house while also looking for clues around her other daughter’s nearby home, which she had visited just hours before disappearing.

Investigators have recovered and are analyzing several pieces of evidence, including a pair of gloves, the sheriff’s department said.

Authorities on Thursday briefly put up a tent in front of Nancy Guthrie’s entryway where her blood was discovered in the early days of the investigation, and where a doorbell camera captured images of a masked person the night she went missing. The FBI released descriptors of that person Thursday, whom it now calls a suspect, in a post on X.

The post describes the suspect as a 5-foot-9-inch or 5-foot-10-inch male with an average build, and included photos from multiple angles of a black, 25-liter “Ozark Trail Hiker Pack” backpack, which the agency said is the brand and model the suspect was wearing.

“We hope this updated description will help concentrate the public tips we are receiving,” the FBI said, noting the thousands of tips it has gotten since Nancy Guthrie’s disappearance.

FBI Phoenix also announced it has hiked its reward to $100,000 for information on Guthrie’s disappearance.

Authorities have said Guthrie was taken against her will. She’s been missing since Feb. 1, and authorities say she takes several medications and there’s concern she could die without them.

Several hundred detectives and agents are now assigned to the investigation, which is expanding in the area, the Pima County Sheriff’s Department said.

Savannah Guthrie and her two siblings have indicated a willingness to pay a ransom. But it’s not known whether ransom notes demanding money with deadlines that have already passed were authentic.